package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.SetmealDto;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.Mapper.SetmealMapper;
import com.itheima.reggie.entity.SetmealDish;
import com.itheima.reggie.service.SetmealDishService;
import com.itheima.reggie.service.SetmealService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class SetmealServiceImpl extends ServiceImpl<SetmealMapper, Setmeal> implements SetmealService {
    @Autowired
    private SetmealDishService setmealDishService;
    @Autowired
    private SetmealService setmealService;


    /**
     * 根据id删除套餐
     *
     * @param ids
     */
    @Override
    @Transactional
    public void removeWithDish(List<Long> ids) {
        //select count(*) from setmeal where id in (1,2,3) and status = 1
        //查询套餐状态，确定是否可用删除
        LambdaQueryWrapper<Setmeal> qw = new LambdaQueryWrapper<>();
        qw.eq(Setmeal::getId,ids);
        qw.in(Setmeal::getStatus,1);

        //框架方法count
        int count = this.count();
        if(count>0){
            throw new CustomException("套餐正在售卖,不能删除");
        }

        //如果可以删除，先删除套餐表中的数据---setmeal
        setmealService.removeByIds(ids);

        //delete from setmeal_dish where setmeal_id in (1,2,3)
        LambdaQueryWrapper<SetmealDish> sd = new LambdaQueryWrapper<>();
        sd.in(SetmealDish::getSetmealId,ids);
//删除关系表的数据
        setmealDishService.remove(sd);
    }

    //保存
    @Override
    @Transactional//新增需要保存套餐和菜品的关联,需要事务
    public void saveWithDish(SetmealDto setmealDto) {

        //保存套餐基本信息,操作setmeal,setmealDto
        this.save(setmealDto);
        //拿到一个集合,存的都是setmealdish的关联关系信息
        List<SetmealDish> sd = setmealDto.getSetmealDishes();
        sd.stream().map((it) -> {
            it.setSetmealId(setmealDto.getId());
            return it;
        }).collect(Collectors.toList());

        //保存套餐和菜品的相关信息,操作setmeal_dish,执行insert操作
        setmealDishService.saveBatch(sd);
    }

    //回显
    @Override
    public SetmealDto getByIdWithsetmeal(Long id) {
        Setmeal setmeal = this.getById(id);
        //
        LambdaQueryWrapper<SetmealDish> qw = new LambdaQueryWrapper<>();
        //添加条件
        qw.eq(SetmealDish::getSetmealId, id);
        List<SetmealDish> list = setmealDishService.list();
        SetmealDto setmealDto = new SetmealDto();
        BeanUtils.copyProperties(setmeal, setmealDto);
        setmealDto.setSetmealDishes(list);

        return setmealDto;
    }


}
